Nothing wrong with the Edelbrock carb, Holleys are just more popular, like Chevys. Not better, just more popular. Edelbrocks are just as tunable as Holleys. In fact, the Carter AVS was the simplest carb to tune all-around, and Edelbrock just came out with their AVS. With the AVS you can do most of your carb tuning without ever opening the carb. The marine Holley is nothing but a run-of-the-mill vacuum-secondary Holley design so the bowl vents don't spill over. Nothing but fire-protection.